The first distinct utterance of a truth which has been so full of comfort to many thousands; it is the summing up of all controversies (compare John 9:2) as to the mystery of suffering. The apostle writing to the Hebrews can find no stronger comfort Hebrews 12:6 than this; the Church, in her visitation service, has no truer message for the sufferer.

Whom the Lord loveth - To encourage thee to bear correction, know that it is a proof of God's love to thee; and thereby he shows that he treats thee as a father does his son, even that one to whom he bears the fondest affection.
The last clause the Septuagint translate μαστιγοι δε παντα υἱον ὁν παραδεχεται, "and chasteneth every son whom he receiveth;" and the apostle, Hebrews 12:6, quotes this literatim. Both clauses certainly amount to the same sense. Every son whom he receiveth, and the son in whom he delighteth, have very little difference of meaning.

For whom the Lord loveth he correcteth,.... This is a reason why the children of God should not despise corrections, nor be weary of them; since they spring from love, are given in love, nor is there any abatement of it in them: when the Lord chastens and corrects, he does not take away his lovingkindness from them; yea, it is because he loves them that therefore he thus deals with them; wherefore they ought to be patiently bore, and kindly taken by them;
even as a father the son in whom he delighteth; as a father chastens and corrects his son, whom he dearly loves, and has the greatest pleasure in, so the Lord chastens and corrects his people; see Deuteronomy 8:5. There is such a relation subsisting between them as that of father and son, which flows from the inexpressible love of God to them; and which is a love of complacency and delight in them, and is invariable and unchangeable, and continues the same under all their afflictions; as appears by what he does for them in them, and by the issue of them; he knows their souls in adversity, and chooses them in the furnace of affliction; he pays love visits to them, and comforts them under all their tribulation; he sympathizes with them, and supports them; he makes their bed in their affliction, and delivers out of it, or takes them to himself: the issue is always his own glory, and their good.

he delighteth--or receiveth as denoting reconciliation regarding the offense which produced chastisement.